Investigate changes in SERVER-40435: A clearJumboChunk command to clear the jumbo flag

Description

Description of Linked Ticket

Currently the steps to clear the jumbo flag for a chunk is quite complicated, prone to user error, and requires modifying the config database. It would be nice to support a clearJumboChunk command on the mongos, which goes through the proper versioning protocol and doesn't require direct access to the config servers.

Scope of changes

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MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)